I want to receive a standard time-length pulse wave of 12 volts (less is good too) when I input a voltage level. That means, when I raise the input from 0 to 1, I expect at the exit one, and only one, pulse of standard duration.

I thought of a 555 monostable but the output doesn't fall unless the input falls to zero.

Actually, I have only 0.5 Volt, not enough to turn on the transistor, but I can work around that.

Thanks a bunch!

Click to expand...

You could use the biasing method I talked about on the last thread. (Remember the resistors should probably go up to Vcc and down to ground, not to collector and emitter.) A comparator could also work.